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Boron carbide
(norbide)
CAS no: 12069-32-8 Formula: B4C Molecular weight: 55.255
Physical Data
Appearance: Hard, shiny black crystals.
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Melting point: 2350 °C
Boiling point: >3500 °C
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Density: 2.5 g/cm3
Solubility: -
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Thermodynamic Data
Enthalpy of formation: -
Gibbs energy of formation: -
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Entropy: -
Heat capacity:-
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Production and preparation
Prepare commercially in furnace at 2500°C. Also formed by reducing boron oxide (B2O3 with magnesium
in the presence of carbon. In laboratory, it can be prepared by reduction of boron trichloride with hydrogen in the presence
of carbon.
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Behavior and Chemical Properties
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History and Uses
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Hazard, Storage and Handling
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(Last update: March 2003) |
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